Locomotive-headlight.



4 SHEETS*EHEET LOG-GMOTWE EMBL APPLIMTLGN FILED JAH. 1s, 1913.

bling.

, Piau 5. W. BUNN. LOGOMOTIVE HEMJJGHI'.A

APPLICATION FILED JAN. 1s, 191s.

Ptentd June 23,1914.

LLHS@ 4 SHEETS-SHEET 4.

EST

su. iw.

Application filed Z1' lle,

Warn trespessers upon the night et wey end' essi-st the observation O engineer.

The object el the presentd invention to develop e high efficiency headlight illumi- Dated by combustion of readily obtainable grades of hydrocarbon uel, and e burner preferably ef tubular construction with e reflector and a lens is employed. The re- Heston is of spheiicel concave type spaced from the burner zi distance leave the burner in the vertical plane of its spherical. center, but adjusted vetieelly to leevel the burner beneath the exis of releetel, se that the ielector produces e ieel image of the flame in thesezne vevticelf plane 'the burner, but sueiently eheve and in in,-

vef'ted position te eeuse the lsmeof the: image te me "ge with the flame of the heisses and thereby produce, in efeet, e @'uplicsten iniuetiou, and coiespondingl inei-"ei Athe illuminating; pevver ef the heen?, lens is of Fresh-eli type with e definite :'eeel point om which it is adapted te ps .allelize the iays of light, het located. et e less distance from the plaine si the tzfue and image than its oeel diste-nce', Wi *1- the deuhle advantage of ie'ceiving n greater pseportion of the light and delivering the seme onlin-es slightly diverging rompeiellelism in order to enlarge the been?. te the neeesseefy aree of illumination et the extreme required, and et the seme time to aveid too sharp :1 definition het-Ween t le light snee end the surrounding delniess. 'Souple/d with the aforesaid conditions eff light seance. irefleetov aud lens, are certain consi' l ehmacteistics of thellemp hedy esse-sensei;- 1 que 1' v ,v l I n less-el pi isuss if-hielt The invention willl he fully understood' upon reteienee te the accompanying dmv!- ings, in Which- ,Figure l' a side elevation or e completelpeeuiotive headlight to which the ezesent invention is applied; 2 is e idnt elevation of the seme; Fig. 3 is e vertical' longitudinal section of the seme; Fig. el is eY transverse sectien of the seme; Fig. is a heiizentel section 4en the line 5 5 of Figs. l, 2, and s, and Fie. 6 is e. vetiee-l seetion of the ventilator on en enlarged seele.

7 is e. diagrammatic view.

l represents the housing of the headlight;

with angularly. presented translucentnumbei" panels 2; 3 is the movable side elosule' eeiiying ene ofthe numbe panels 2, es Well the hemd hole 4 and inspection opening 5;

' seid side closure being milde t0 confesse te the approximately cylindrical trensveitsesection ef `the housing 1 end being hinged et 3 on the front Wall and secured by e latch 3b te the-beck Well; 6 is the nievehle front closure carrying the lens 7, the gued 8 and removable shield 9; and ,l0 is the ventihtte.' 4 The end closu-e'f is hinged on. one side 6gz .end provided en the 'ethes side with leech 6'. El; eempises all the front W2ill.,;y with the eXcepti-ezi ei e, herren' insane nner vided te Eeeeise 1t-avhieh freine is suiestanMu ftievy eiieulsr in eonmity *.vith the freni me, except bestem Where iffessesteJ supper' euse. 'Ehe is er? eehh eeneezltie cire' ive te' lens @eine 39 pesant-ely snelst *esel with 1 ,ves eine' 'hoezen eheeh'. edelh it i leeetie-n in close pmximity te soniee with eensequen" ineeuse ini lig-he eren.. The she-sld' W guusd 8 andl is 1 mvided with uppe :retaining tongnes T13-9b? Chiesi-)h epeytues in the guard S une such length et by raising the shield, is

tengue'w* is tel/eased so that he swung -ontvveirdly Y nl? foi' Temvsul.. Hengste c en. the heele of the` headlight ireeeive the shield 9 when not in use. lhe 'ndmhev panels. 2 ere cannedby light hoses .23 psojeeting inem the cylindrieel wells' of the housing and. having isi and downs/sg to receive suitable glazing 2h; also a conlining freine@c hinged et '12d and adapted be secured in closed position by jam-nut 20, The sight opening A5, While preferably closed, is also adapted to be closer by a slide 5 having a retaining' clip 5l). The hand hole '-l is provided with a closing slide el prel'erul'ily mounted on the inner Wall of the housing'.

The ventilator l0, as shown more clearly in llig. 6, comprises e hood l0 hinged at 10b upon a pyramidal base l0@ and provided with e latch. 10"l releasuble to permit the hood to swing upwardly to give access to interior parts. Resting upon the pyremidel base independently of the hood l0c1 is e ivind screen comprising upper and lower pen forated disks 10Q, lOf, spaced apart to provide a chamber between them;l the disk 10 being seated within the upper end of the base 10c und the disk 10C being supported froin'the disk l0f by means of the chimney liuc 10g, which stands on the disk l0i and terminates in a flaring skirt l0 forced into position Within the cylindrical portion of the chimney tlue and being thus easily removable. Disk 10a is sprung' into place in the annular groove provided for it on the chimney 10g, or may else be made in two parts joined together. The hood 10a, when closed, rests in contact with the disk l0e besides providing tight side Walls for the chamber between the disks, While above the disk 10Q, said hood is constructed with periiorete side Wall 10i and iiuperiorate top Wall 10k providing an intake chamber for fresh to support combustion. @he line 10g extends through the top wall l)lL of the fresh nir. elir'imber and terminates in u contracted end 10m :Within the cowl 1.00' which comprises an expansion elunnber i0, e. dciector l0 and i cap l0?. lllie lower end oi the tinev l()g is likewise provided with d de lcctor ills. lle vrnll lsll und depending in protectii 1 to the perilorute wall lill, is u gue lie ventilator thus c`nstructecl pro-vinile; tivo con centric passages for the intake ol' air in suL port of coinoustien und th product-s oil co ilustion.

floh es well the rainnilal direc the side im .ls oi bulzir construction, supplier spherical type, supported with vertical afljustinent upon the posts l5 and placed in such position thet the light sourcell stands in the vertical plane of the geometrical eenm ter of the reilector but slightly below the airis, with the result that the reliector focuses in said plane, a real lout inverted image of the llame, sullieiently above the true Home to avoid eclipsing` the reflection and in ellect producing a tlunie of double dimensions, or in other Words, delivering to the lens 7, re lected rays which are substantially equivalent to the direct rays from the light source. The distance oi' the lens from the vertical plane oi the true llame and image is slightly less than the focal distance, so that While the lens is constructed to parallelize rays emitted fromits focus point, it Will deliver a benin of illumination thatis slightly divergent and thus develop Athe necessary area of. illumination at the distance where illumination is mostly needed. The lens has the further el'lect, probably due to such inaccurac-ies as are unavoidable in a lens that is molded end. notg-round, of dispersing some of the light on the outer edge el the projected beam and `"thus avoiding the objection oi having too sharp a definition between the immediate area of illumination and the surrounding1 darkness, with the advantages ulrc-edy described.

lo represents the lrnip chimney and. l? a si staining` ,duide for t ie upper end thereof, which is pre'l'crsl'ily constructed ol" a spiral winding on e rigid annulus, which latter e1;- tends from a yoke 17a projecting upwardly from the reservoir. As shown in Fig. 5, the ll is extended horizontally on L' the lamp. This is ior the pur 'lier or pose oit extending; the Walls oil the reservoir and increesingg the coolingv e'i'ect thereupon of the cool :iirdrmvn in through the ventilaton The oil is thereby kept in better con or, the lmnp and the lens in the parrelntions described, and yet perinit- 'the removal of the lamp and reflector for cleaning and adjustment, the lainp end 'r 'lector are supported upon a base l@ tlnfmigh the medium of standards i8, lh,

und the base is in turn held in the guides l" Yhat the lamp and, reliector may be but Will always be returned he proper relation to each other, proper position relatively to the jin upwardly deflected portion i8@ in the base i8 provides a panel :tor the admis sion ot soinair through the perorations ld in bottoni of the housing l. The loote f' nd beck of the housing' are constructed hree lruninze, namely, the inner sheet of r, the outer sheet oi" metal lb, and

' L" of heat i insulation l, construction is to pro 'ice l l (l toet the lamp from heet radietetL f l a light source 'producingan uprigrit 'flameP the upper edge of said llame heine' suhstan rein tne tially in said axis and the axis or the naine being in the focus of the reiiec'tor.

2, ln a headlight, a eoneave spherical reflector placed with the axis horinon concave lens of the Fresnel type, having its in alineinent with the oit said reflector, the focus of the lens being situated between the reflector and the rellevor if'oeus, a light source producing an upright, flame, the upper edge of said thune being substantially in said axis and the axis of the llame being in the 'focus of the reflector, whereby said reflector Will throw an inverted image or' the flame on said lens without the rellection being eclipsed.

B. liu a locomotive headlight, the con1l ination or housing, parallel guides in said housing, a lamp base litted to said guides and removably secured thereby in said housing, a reservoir supported upon said oase with laterally` extending sides, posts projeing from the sides of said reservoir, a mirror supported on said posts, a lamp also mounted on said hase in tixed relation. io said mirror but entirely free therefrom, and a lens` mounted upon the housing in fixed relation to the guides which receive said hase.

4. lin a locomotive headlight, the combination of a housing, a reservoir mounted in said housing with a transverse portion and two longitudinal portions, a yoke extending upwardly from and supported oy said lonitudinal portions of the reservoir, e lamp ted between the longitudinal portions of the reservoir, and adapted to receive a chim- 1, a lens in front and a reflector behind lainp, and a chimney guide mounted said yoke above the lmnp and free said reflector, in position to receive the end of a chimney when applied to locomotive headlight, the combi` a suitble housing, a fuel burner of: lain-p, a reservoir for said lamp constructed with transverse and longitudinal portions, and a top ventilator for the headlight delivering air downwardly over the walls of the housing and between said walls and transverse and longitudinal port-ions of i 'the rese "voir 8. a locomotive headlight, the combination of a housing, a fuel burner Within said housing, a reservoir for said fuel burner constructed with 1lnansverse and longitudinal portions paralleling the 'Walls of said housing' and heatJ insulating material provided upon the walls of said housin'.

The foregoing speeication signed at Kansas City, Missouri, this 26th day of December, 1912.

JOHN W. BUNN.

in presence of two witnesses:

llnwls L. MILLER, 'Lezen E, Cor-irs.' 

